In the Victorious episode (Season 3, Episode 9), it is revealed that Trina Vega was accepted into Hollywood Arts High School not because of her talent, but because of a series of bizarre coincidences involving an intoxicated teacher. The Real Story: Sikowitz's Hallucination
: In his intoxicated state, Sikowitz signed "Yes" on his own ballot and forged the "Yes" signatures for all the other teachers who were busy with Sinjin, officially admitting her to the school. Episode Subplots
While the students spend the episode speculating on various wild theories (like André's theory that Trina is a secret pop star), the actual reason is revealed by Sikowitz at the end of the episode:
: Sikowitz stayed behind to watch the audition, but he was drinking rotten coconut milk at the time.
: André believes Trina was part of a secret pop group and performs a high-energy dance number to illustrate his theory.